Mechanism for and method of making glaziers&#39; point



April 30, 1968 c. w. SKINNER 3,380,281

MECHANISM FOR AND METHOD OF MAKING GLAZIERS' POINT Filed Oct. 6, 1964 FI 5 INVENTOR.

CHARLES WESLEY SKINNER ATTORNEYS United States Patent 3,380,281MECHANISM FOR AND METHOD OF MAKIYG GLAZIERS POINT Charles WesleySkinner, 181 Torrey St., Brockton, Mass. 02457 Filed Oct. 6, 1964, $91.No. 401,864 1 Claim. (Cl. 72-330) ABSTRACT OF THE DISCLOSURE Mechanismis provided for making glaziers points from a metal strip, the pointsbeing generally triangular in shape, with an upstanding tongue near thebase of the triangle. The mechanism comprises an anvil having aper-"tures therethrough the two dies which descend into the apertures tosever two points simultaneously from the metal strip and at the sametime bend the tongue of one of the points vertically upward and thetongue of the other point downward.

This invention relates to a mechanism for and method of making glazierspoints of a novel kind, two at a time, from a strip of metal. Glazierspoints of the usual kind are small triangular or diamond shaped bits ofmetal one of the apices of which is to be forced into the wooden stiles,rails and bars which surround the panes of glass in a window. This isoften diificult to do in the absence of a special tool for the purpose.The points made as hereinafter described have a sharp apex to penetrateinto the glass, and an upstanding tongue which provides a convenientpurchase for pushing the apex into the Wood. The mechanism for makingpoints of this kind comprises an anvil wit-h suitably shaped apertures,and a die adapted to be reciprocated up and down by a power press or thelike to cooperate with the anvil in cutting and forming two points froma metal strip with each descent of the die.

For a more complete understanding of the invention, reference may be hadto the following description thereof, and to the drawing, of whichFIGURE 1 is a perspective view of a die and an anvil embodying theinvention, with the end portion of a metal strip upon the anvil;

FIGURE 2 is a fragmentary section on the line 2-2 of FIGURE 3;

FIGURE 3 is a section on the line 3-3 of FIGURE 2;

FIGURE 4 is a perspective view of one of the glaziers points produced bythe mechanism; and

FIGURE 5 is a fragmentary plan view of the anvil.

A sample of the glaziers points produced by the mechanism illustrated onthe drawing is shown at in FIGURE 4. This point has the general shape ofan isosceles triangle, but a tongue 12 is struck up from the base 14 ofthe triangle and the upper half 16 of each of the sides of the triangleis offset inwardly as at 18 from the lower half 20 so as to reduce thedistance from the tongue to the apex 21 of the point. As is evident fromFIGURE 3, from a strip of metal having a width equal to the altitude ofone of the triangles, a die 22 having two zig-zag edges 24, 26 meetingat a point 28 at the lower end of a reciprocable tool 29 can be used tocut simultaneously two points 10 since with each operation the edge 24leaves the leading end edge of the metal strip 30 correctly shaped toserve as a side edge for the next point 10 cut from the strip by the die22.

To form the upstanding tongue 12, the die 22 is provided with a recess32 the side edges 34 of which make shearing cuts with the side edges ofa lug 38 which is a fixed part of an anvil 40 mounted below the die 22.The

3,380,281 Patented Apr. 30, 1968 anv-il 40 has an aperture 42 with acontour similar to that of a point 10. The die 22 has a similar crosssectional contour and is mounted above the aperture 42 so that when itdescends, it cuts out a point 10 from the strip or ribbon 30 of metalplaced on the anvil over the aperture. In practice, the strip 30 isadvanced after each cut so that the leading edge 44 is in the positionindicated in FIGURE 3. Each stroke of the die thus severs two points 10from the strip 30 and leaves a new leading end on the strip ready to beadvanced to the position for the next cut. When the die cuts .out thetwo points 10, the point next to the end is pushed down through theaperture 42. At the same time the side edges of the tongue 12 are cutand the tongue is bent upward as the point is pushed down past the endof the lug 38, as indicated in FIGURE 2. As the point 10 next to the endpoint is pushed down through the aper ture 42, the end point is severedfrom the strip 30 as it rests on the face of the anvil. A second die 46at the lower end of the tool 29 reciprocates with the die 22 and movesinto and out of an aperture 48 in the anvil 40. The side edges of thedie 46 out two slits in the leading point 10 to define a tongue 12 whichis thereupon bent down over the edge 50 of the aperture 48 so that itprojects down into the aperture. When the dies rise from the anvil, theleading point 10 is left on the surface and can be removed laterally.This can be done manually or by an ejection device (not shown), or itcan be pushed along by the advancing end of the strip 30 from which thetwo points 10 have just been cut. A slot 52 in the anvil is provided inline with the edge 50 so that the end point 10 can be slid along theface of the anvil with its tongue extending down therefrom. The points10 which are pushed down through the aperture 42, and those that arepushed off the side edge of the anvil are collected in a suitablereceptacle (not shown) and are ready for use.

I claim:

1. Apparatus for making glaziers points comprising an anvil having aplane face with an aperture therethrough with side edges forming sidesof an isosceles triangle the upper halves of which are inwardly offsetfrom the lower halves and a lug extending inward from the base of thetriangle, said anvil having a second aperture therethrough spaced fromthe first aperture and a slot extending from said second aperture to aside edge of the anvil, and a reciprocable tool having two dies arrangedto enter said apertures respectively and to make shearing cuts with theedges forming the sides of said triangle whereby to sever two pointssimultaneously from a strip of metal laid on said anvil over saidapertures, said dies having portions to form and bend up a tongue fromthe base of one said point and to form and bend down a tongue from thebase of the other said point.

References Cited UNITED STATES PATENTS 1,119,686 12/1914 Davis -112,431,812 12/1947 Lang 72330 861,188 7/1907 Jones 8515 1,828,341 10/1931Routledge 8515 2,031,024 2/ 1936 Ahlquist 72-330 3,168,884 2/1965Williams 72330 1,066,646 7/1913 Naumann 85-15 FOREIGN PATENTS 173,10011/1952 Austria.

CHARLES W. LANHAM, Primary Examiner. CARL W. TOMLIN, Examiner. R. S.BRITTS, E. M. COMBS, Assistant Examiners.

